Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 2 · Signs, Planets, Birth
जातकम् १
पार्श्वे कुक्षी त्वपानांघ्री मेढ्रमुष्कौ तथा स्फिजौ ।पुच्छं चतुष्पदांगेषु मेषाद्या राशयः स्मृताः ॥ ३४ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 55, verse 34.
The two sides, the belly, the anus, the hind feet, the penis and testicles, the buttocks and the tail. These are the limbs of a four-footed animal, given to the signs from Aries on.
Simple meaning: For a four-footed animal, the signs from Aries on stand for its body parts in this order.
लग्नांशाद्ग्रहयुग्दृष्ट्वा वर्णान्बलयुताद्वदेत् ।
An animal's colours come from the lagna's navamsha or the strongest planet tied to it. The 7th gives stripes.
विप्रलैस्तनुचंद्रेज्यार्कैस्तरूणां जनिं वदेत् ।
A weak lagna, Moon, Jupiter and Sun point to trees. The navamsha shows land or water trees.
स्थलांबु च पतिः खेटो लग्नाद्यावन्मिते गृहे ।
The number of trees is told by how far the planet stands from the lagna.